Door for mixing machines



Apr. 24, 1923. 1,452,823

H. BESSER ET AL DOOR FOR MIXING MACHINES Filed May 23 1921 ATTORNEY 1URTE-STATES! Patented Apr. 24, 1923.

: HERMAN- Basses were; or i'LrnnA, MICHIGAN.

:oooR r012; ma a MACHINES.

- Application filed Ma 23,-

To all whom it may concern:

Be it known that'we, and Jesse H. BnssER, citizens of the United States,residing at Alpena, in the countyof Alpena and State of Michigan, have 1nvented certain new and useful'lmprovements in Doors for Mixing Machines and we do hereby declare the followingito be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and usethe same.

This invention relates to mixing machines and pertains more particularly to machines for the mixingof concrete and similar materials.

One object of our invention is to provide in a machine of this class an improved means of discharging the material immediately upon the completion of the mixing operation and without stopping the paddles, the ejection of the material being accomplished by the mixing paddles.

l/Vith these and certain other objects in view which will appear later in the specification, our invention comprises the devices described and claimed and the equivalents thereof.

Fig. 1 is a transverse sectionalview.

Fig. 2 is a fragmentary front view, showing the discharging door closed.

Fig. 3 is a similar View, showing the door open. I

We provide a part-cylindrical stationary drum 1, which may be open at thetop, as shown, or provided with a suitable cover, the rear or charging side of the drum formed with an apron 2 and. the front or discharging side provided with a tight-fitting removable door or closure 3, the operation of which will be described presently.

A central revolvable shaft 4 is located axially in the drum, theshaft being mounted in suitable bearings carried by end plates 6 to which the drum 1 is secured.

Radial arms 7 secured to shaft 4 near its middle carry part-helical mixing blades 8 and 9, the outeredges of which travel in close proximity to the inner surface of drum 1, the ends of the blades traveling close to the inner faces of the end platesc6.

Blades 8 and 9 are so disposed with relation to each other that they both tend to move the material toward the middle of the length of the drum, thus eliminating end thrust on the shaft 4- and automatically HERMAN BESSER- 1921. serial No. 471,795.

PATENT OFFHQE. a

the machine is provided with door 3, which tits the opening 10 when closed and has its inner, face flush with the inner surface of the drum-1, the door having the same curvature as thedrum. A flange 11 is provided around the outer edge of the door 3, to overlap the edges of opening 10.

A bar 12, having laterally projecting ends, is secured to the door 3, the ends of the bar being pivotally secured to the outer ends of a pair of arms 13 carried by a rock shaft 14 mounted on suitablebearings 011 the end plates 6.

The rock shaft is erating handle 15.

A second bar 16, also having laterally projecting ends, is fixed to the lower edge of door 3, the projecting ends of bar 16 slidingly received on guides 17 carried by the drum 1 and spaced apart therefrom, as shown in Fig. 1.

lVhen handle 15 is raised, rocking the arms 13, the door 3 is lifted bodily outwardly and upwardly from the position shown in Fig. 2 to that of Fig. 3, the lower part of the door being guided by the members 17 into the position shown in Fig. 1. When handle 15 is swung downwardly,

provided with an opthe'door is closed, the guides 17 returning the lower part of the door 3 into proper relation with the opening 10, the lower parts of the guide 17 being closer to the drum than their upper parts and serving to mass is worked by the mixing blades 8 and 9 over and over and gradually col lected from the ends of'the drum toward the middle. Since the helical mixing blades travel close to the ends of the drum and to its inner cylindrical surface, these surfaces are scraped quite cleanand when the door 3 is open as above described, the material is lifted up and discharged from'the opening 10 at each revolution of the blades until practically all of the material has been removed from the drum. It is then ready for another charge.

By the means above described, we have produced a simple and comparatively inexpensive, yet effective mixer that has few charge; opening at one side of said drunr, ax

Working parts, ispractically self-cleaning What We claim and desire-to-secure by Lets ters Patent is:

1. In a mlxlng maehme,'the combination: of a. stationany cylindrical drum,v a dis removable door for said opening; guides engaging thelower? part of saldi door; plviotedrocker arms COHIIGOtBdatO the upperendf of said door, and. a rook-shaft supporting I said arms.

2.; In a? mixing machine; the combination of at stationary cylindrical drum; said drum formed, with a side discharge opening, a removable closure for said. opening, lateral projections near the lower edge of said closure, fixed guides engaging said projections, a rock-shaft, and a pair of rocker arms on said sh*at, said= armspivoted to said closure near the upper part thereof.

In testimony whereof, We" affix; our sig natures: in: presence of twoi Witnesses.

HERMAN BESSER'. JESSE- H. BE SSER'.

Witnesses H, A. DicmNsoN, L; W COUTURE. 

